Manchester United striker Cristiano Ronaldo has been left unimpressed by the work of caretaker manager Ralf Rangnick.
The Daily Star says Ronaldo is 'ready to quit ' United if he disagrees with who the club appoint to be their next boss, having only returned five months ago.
The 36-year-old, who has a contract until 2023, is understood to be among a host of Old Trafford stars currently unhappy with the German coach's methods.
Rangnick has already agreed a two-year deal to become a 'Senior Football Advisor' upon leaving the dugout in May, meaning he will - for better or worse - be sticking around upstairs.
But Ronaldo's opinion could weigh heavily, with the Portuguese a strong influence in the dressing room.
Losing the the five-time Ballon d'Or winner would certainly see the Red Devils light for goals, having scored 14 in his 21 appearances since sensationally re-signing in August.
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